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EP-4738946-A2 - WIRELESS COMMUNICATION METHOD AND DEVICE

EP4738946A2EP 4738946 A2EP4738946 A2EP 4738946A2EP-4738946-A2

Abstract

The present application provides a wireless communication method, a terminal device and a network device. The method includes that: according to a first downlink signal corresponding to an SRS resource set, a terminal device determines a same target path loss value for SRS resources in the SRS resource set; according to the same target path loss value, the terminal device determines a target transmission power for an SRS resource in the SRS resource set; and according to the target transmission power, the terminal device transmits an SRS to a network device on the SRS resource in the SRS resource set.

Inventors

  • CHEN, WENHONG

Assignees

  • GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Dates

Publication Date
20260506
Application Date
20170527

Claims (15)

  1. A wireless communication method, comprising: determining (210), by a terminal device, a same target path loss value for Sounding Reference Signal, SRS, resources in a SRS resource set according to a first downlink signal corresponding to the SRS resource set; wherein the same target path loss value is determined for the SRS resource set and the determined target path loss value is used as a path loss value corresponding to all SRS resources in the SRS resource set; determining (220), by the terminal device, a target transmission power for an SRS resource in the SRS resource set according to the same target path loss value; and transmitting (230), by the terminal device, an SRS to a network device on the SRS resource in the SRS resource set according to the target transmission power.
  2. The method according to claim 1, wherein the SRS resources in the SRS resource set are configured by the network device.
  3. The method according to claim 1 or 2, further comprising: receiving, by the terminal device, first indication information that is sent by the network device, wherein the first indication information is used to indicate the first downlink signal.
  4. The method according to claim 3, wherein the first downlink signal is a Channel State Information Reference Signal, CSI-RS, or a synchronization signal block.
  5. The method according to claim 3 or 4, wherein the first indication information is configured to the terminal device together with configuration information of the SRS resource set by using Radio Resource Control, RRC, signaling.
  6. The method according to any one of claims 3 to 5, wherein receiving, by the terminal device, the first indication information that is sent by the network device comprises: receiving, by the terminal device, from the network device which pre-configures multiple CSI-RS resources through high-layer signaling, indication of an index of one of the CSI-RS resources for downlink path loss estimation; or receiving, by the terminal device, from the network device, indication of a time index of a synchronization signal block for downlink path loss estimation, so that the terminal device performs the downlink path loss estimation based on a synchronization signal in the synchronization signal block corresponding to the index or a Demodulation Reference Signal, DMRS, of a Physical Broadcast Channel, PBCH, in the synchronization signal block.
  7. The method according to any one of claims 1 to 6, wherein determining (220), by the terminal device, the target transmission power for the SRS resource in the SRS resource set comprises: determining, by the terminal device, a same target transmission power for the SRS resources in the SRS resource set.
  8. The method according to claim 7, wherein transmitting (230), by the terminal device, the SRS to the network device on the SRS resource in the SRS resource set according to the target transmission power comprises: transmitting, by the terminal device, SRS to the network device on the SRS resources in the SRS resource set according to the same target transmission power.
  9. The method according to claim 8, wherein transmitting, by the terminal device, the SRS to the network device on the SRS resources in the SRS resource set according to the same target transmission power comprises: transmitting, by the terminal device, the SRS to the network device using different transmission beams on different SRS resources in the SRS resource set respectively according to the same target transmission power.
  10. The method according to any one of claims 1 to 9, wherein before determining (210), by the terminal device, the same target path loss value for the SRS resources in the SRS resource set according to the first downlink signal corresponding to the SRS resource set, the method further comprises: determining, by the terminal device, the same first downlink signal corresponding to the SRS resource set according to a first preset relationship.
  11. The method according to any one of claims 1 to 10, wherein determining (210), by the terminal device, the same target path loss value for the SRS resources in the SRS resource set according to the first downlink signal corresponding to the SRS resource set comprises: determining, by the terminal device, a path loss value used for calculating a transmission power of a first uplink signal as the same target path loss value.
  12. A terminal device (300), configured to perform the wireless communication method according to any one of claims 1 to 11.
  13. A wireless communication method, comprising: transmitting, by a network device, first indication information to a terminal device, wherein the first indication information is used to indicate a first downlink signal; wherein the first downlink signal is used by the terminal device to determine a same target path loss value for Sounding Reference Signal, SRS, resources in an SRS resource set; and receiving, by the network device, an SRS transmitted by the terminal device according to a target transmission power on an SRS resource in the SRS resource set; wherein the target transmission power for the SRS resource in the SRS resource set is determined by the terminal device according to the same target path loss value.
  14. The method according to claim 13, wherein the SRS resources in the SRS resource set are configured by the network device.
  15. A network device, configured to perform the wireless communication method according to any one of claims 13 to 14.

Description

TECHNICAL FIELD The present application relates to the field of communications and, more particularly, to a wireless communication method and device. BACKGROUND In the New Radio (NR) system, uplink beam management, including transmitting beam management and receiving beam management, may be performed based on a Sounding Reference Signal (SRS). For the transmitting beam management, the terminal device may send the SRS by using different beams on a plurality of SRS resources, and the network side selects at least one SRS resource based on strengths of the received signals on the plurality of SRS resources and indicate it to the terminal, so that the terminal uses a beam corresponding to this SRS resource for transmitting data. For the receiving beam management, the terminal transmits the SRS by using the same beam on one or more SRS resources, and the network side receives the SRS signals on the plurality of SRS resources based on different receiving beams, and selects a receiving beam for receiving data according to strengths of the received signals. The selection of the transmission power of the SRS signal has an important influence on the selection of the receiving beam and the transmitting beam in beam management. Therefore, how to control the power of the SRS signal is an urgent problem to be solved. SUMMARY The embodiments of the present application provide a wireless communication method and device, which can perform reasonable power control on the SRS. In a first aspect, there is provided a wireless communication method, including: determining a target path loss value for a Sounding Reference Signal (SRS) resource in a SRS resource set according to a first uplink signal, a first downlink signal, a first beam, or a first beam pair link corresponding to the SRS resource set;determining a target transmission power for the SRS resource in the SRS resource set according to the target path loss value; andtransmitting an SRS to a network device on the SRS resource in the SRS resource set according to the target transmission power. In combination with the first aspect, in a possible implementation of the first aspect, the determining the target path loss value for the SRS resource in the SRS resource set includes: determining a same target path loss value for the SRS resources in the SRS resource set. In combination with the first aspect or any of the above possible implementations, in another possible implementation of the first aspect, the determining the target path loss value for the Sounding Reference Signal (SRS) resource in the SRS resource set according to the first uplink signal, the first downlink signal, the first beam, or the first beam pair link corresponding to the SRS resource set includes: determining the target path loss value for the SRS resource in the SRS resource set according to the same first uplink signal, first downlink signal, first beam, or first beam pair link. In combination with the first aspect or any of the above possible implementations, in another possible implementation of the first aspect, the determining the target transmission power for the SRS resource in the SRS resource set includes: determining a same target transmission power for the SRS resources in the SRS resource set. In combination with the first aspect or any of the above possible implementations, in another possible implementation of the first aspect, before determining the target path loss value for the Sounding Reference Signal (SRS) resource in the SRS resource set according to the first uplink signal, the first downlink signal, the first beam, or the first beam pair link corresponding to the SRS resource set, the method further includes: receiving first indication information of the network device, wherein the first indication information is used to indicate the first uplink signal, the first downlink signal, the first beam, or the first beam pair link corresponding to the SRS resource set, or is used to indicate a resource for carrying the first uplink signal, a resource for carrying the first downlink signal, or a resource for receiving or transmitting a signal by using the first beam or the first beam pair link. In combination with the first aspect or any of the above possible implementations, in another possible implementation of the first aspect, before determining the target path loss value for the Sounding Reference Signal (SRS) resource in the SRS resource set according to the first uplink signal, the first downlink signal, the first beam, or the first beam pair link corresponding to the SRS resource set, the method further includes: determining the first uplink signal, the first downlink signal, the first beam, or the first beam pair link corresponding to the SRS resource set according to a first preset relationship. In combination with the first aspect or any of the above possible implementations, in another possible implementation of the first aspect, the first uplink signal is an SRS, a Physica